George H. Allen
@geoallen.bsky.social
Hydrologist and satellite enthusiast. Associate Professor at Virginia Tech
This weekend my research group volunteered at the Claytor Lake Mussel Salvage event near Blacksburg, VA. We surveyed and relocated hundreds of native mussels during the scheduled biennial lake drawdown. #UtProsim
@vtgeosciences.bsky.social @vt-science.bsky.social
@vtgeosciences.bsky.social @vt-science.bsky.social
November 10, 2025 at 6:48 PM
This weekend my research group volunteered at the Claytor Lake Mussel Salvage event near Blacksburg, VA. We surveyed and relocated hundreds of native mussels during the scheduled biennial lake drawdown. #UtProsim
@vtgeosciences.bsky.social @vt-science.bsky.social
@vtgeosciences.bsky.social @vt-science.bsky.social
Reposted by George H. Allen
Join the Global Flood Partnership (GFP) 2025 Fall Webinar Series!
On November 19, 2025 (16:00 CET), we bring you three expert talks on how Earth-Observation data is transforming flood mapping, risk assessment, and resilience strategies.
Register here: lnkd.in/gjYX3GV8
See also: lnkd.in/gRQFuk_J
On November 19, 2025 (16:00 CET), we bring you three expert talks on how Earth-Observation data is transforming flood mapping, risk assessment, and resilience strategies.
Register here: lnkd.in/gjYX3GV8
See also: lnkd.in/gRQFuk_J
November 3, 2025 at 3:43 PM
Join the Global Flood Partnership (GFP) 2025 Fall Webinar Series!
On November 19, 2025 (16:00 CET), we bring you three expert talks on how Earth-Observation data is transforming flood mapping, risk assessment, and resilience strategies.
Register here: lnkd.in/gjYX3GV8
See also: lnkd.in/gRQFuk_J
On November 19, 2025 (16:00 CET), we bring you three expert talks on how Earth-Observation data is transforming flood mapping, risk assessment, and resilience strategies.
Register here: lnkd.in/gjYX3GV8
See also: lnkd.in/gRQFuk_J
Another SWOT Science Team Meeting for the books!
October 17, 2025 at 4:48 PM
Another SWOT Science Team Meeting for the books!
Reposted by George H. Allen
27 things we wish we’d known when we started our PhDs
Nature’s survey of PhD candidates reveals hard-won wisdom on choosing supervisors, managing mental health and surviving academic culture.
Nature’s survey of PhD candidates reveals hard-won wisdom on choosing supervisors, managing mental health and surviving academic culture.
27 things we wish we’d known when we started our PhDs
Nature - Nature’s survey of PhD candidates reveals hard-won wisdom on choosing supervisors, managing mental health and surviving academic culture.
www.nature.com
October 6, 2025 at 8:36 PM
27 things we wish we’d known when we started our PhDs
Nature’s survey of PhD candidates reveals hard-won wisdom on choosing supervisors, managing mental health and surviving academic culture.
Nature’s survey of PhD candidates reveals hard-won wisdom on choosing supervisors, managing mental health and surviving academic culture.
Reposted by George H. Allen
We’re on Capitol Hill with 225 Earth & space scientists — including @aas.org and @planetarysociety.bsky.social — urging Congress to reopen the government and protect NASA science. 🚀🌍
Join us: buff.ly/a3YuGgY
#ScienceIsEssential #AGU
Join us: buff.ly/a3YuGgY
#ScienceIsEssential #AGU
October 6, 2025 at 4:21 PM
We’re on Capitol Hill with 225 Earth & space scientists — including @aas.org and @planetarysociety.bsky.social — urging Congress to reopen the government and protect NASA science. 🚀🌍
Join us: buff.ly/a3YuGgY
#ScienceIsEssential #AGU
Join us: buff.ly/a3YuGgY
#ScienceIsEssential #AGU
First NISAR L-band images released! They look great! www.jpl.nasa.gov/news/nasa-is...
NASA-ISRO Satellite Sends First Radar Images of Earth’s Surface
Preliminary images from the most powerful Earth radar satellite ever launched offer a tantalizing glimpse of the science the mission will be able to deliver.
www.jpl.nasa.gov
September 25, 2025 at 8:17 PM
First NISAR L-band images released! They look great! www.jpl.nasa.gov/news/nasa-is...
Reposted by George H. Allen
Looking for a postdoc, and interested in river-coastal linkages, #remote sensing, and time series analysis? Come work with us @natureatcal.bsky.social on an exciting project led by @rachelspatial.bsky.social! CC @sfs-src.bsky.social @aslo.org @cerfscience.bsky.social @caseagrant.bsky.social
We're hiring! My lab is seeking a 2-yr Postdoc in 🌊 marine ecology + 🛰️ remote sensing. You'll work with a big team (including @albertruhi.bsky.social @cgerleinsafdi.bsky.social) to study the impacts of changing rainfall on marine freshwater plumes + coastal organisms. aprecruit.berkeley.edu/JPF05114
Postdoc Scholar - Marine ecology – ESPM The Coastal Climate Resilience Lab - MCECO - ESPM Ecosystem Sciences Div - Carlson Lab
University of California, Berkeley is hiring. Apply now!
aprecruit.berkeley.edu
September 23, 2025 at 12:30 AM
Looking for a postdoc, and interested in river-coastal linkages, #remote sensing, and time series analysis? Come work with us @natureatcal.bsky.social on an exciting project led by @rachelspatial.bsky.social! CC @sfs-src.bsky.social @aslo.org @cerfscience.bsky.social @caseagrant.bsky.social
Reposted by George H. Allen
Hello freshwater friends! I’m starting a lab(!!) and recruiting 2 students to start Fall 2026 and a lab/field assistant to start this Fall 2025! Research topic is broad: rivers 🛶, ice/snow ❄️, nutrients 🍂, algae 🌱see below for more info
Please pass this along to any interested folks :)
Please pass this along to any interested folks :)
July 14, 2025 at 8:35 PM
Hello freshwater friends! I’m starting a lab(!!) and recruiting 2 students to start Fall 2026 and a lab/field assistant to start this Fall 2025! Research topic is broad: rivers 🛶, ice/snow ❄️, nutrients 🍂, algae 🌱see below for more info
Please pass this along to any interested folks :)
Please pass this along to any interested folks :)
Flood waves like those that devastated Texas last week can be seen by the NASA #SWOT satellite. Another reason to support #NASA Earth Science
Hydrologists! Ever heard of a Spatial Hydrograph? Our new paper in @agu.org GRL shows that the SWOT satellite can capture spatial flow waves propagating down rivers—something previously only only observable at river gauges: doi.org/10.1029/2024...
#SWOT #hydrology #RemoteSensing #EarthObservation
#SWOT #hydrology #RemoteSensing #EarthObservation
July 11, 2025 at 5:17 PM
Reposted by George H. Allen
AGU H3S invites you to submit an abstract to our session at #AGU25 Thinking Outside the Box Plot:
Communicating Science Beyond the Paper! The session explores creative ways to communicate research. Conveners: @adischner.bsky.social
@acarneiromar.bsky.social
@gescilam.bsky.social
Cee Nell
Emily Ellis
Communicating Science Beyond the Paper! The session explores creative ways to communicate research. Conveners: @adischner.bsky.social
@acarneiromar.bsky.social
@gescilam.bsky.social
Cee Nell
Emily Ellis
July 8, 2025 at 11:15 AM
AGU H3S invites you to submit an abstract to our session at #AGU25 Thinking Outside the Box Plot:
Communicating Science Beyond the Paper! The session explores creative ways to communicate research. Conveners: @adischner.bsky.social
@acarneiromar.bsky.social
@gescilam.bsky.social
Cee Nell
Emily Ellis
Communicating Science Beyond the Paper! The session explores creative ways to communicate research. Conveners: @adischner.bsky.social
@acarneiromar.bsky.social
@gescilam.bsky.social
Cee Nell
Emily Ellis
Reposted by George H. Allen
AGU H3S invites you to contribute to our session at #AGU25 Hydrology Student, Postdoc, and
Early Career Flash Talks! This session highlights
research performed by fellow Early Career Researchers within the field of Hydrology. Conveners: Matthew Preisser and Kathryn Moore
Early Career Flash Talks! This session highlights
research performed by fellow Early Career Researchers within the field of Hydrology. Conveners: Matthew Preisser and Kathryn Moore
July 8, 2025 at 11:27 AM
AGU H3S invites you to contribute to our session at #AGU25 Hydrology Student, Postdoc, and
Early Career Flash Talks! This session highlights
research performed by fellow Early Career Researchers within the field of Hydrology. Conveners: Matthew Preisser and Kathryn Moore
Early Career Flash Talks! This session highlights
research performed by fellow Early Career Researchers within the field of Hydrology. Conveners: Matthew Preisser and Kathryn Moore
🚨New paper🚨 shows a remarkably clean relationship between river width and stream order across the US
𝑇ℎ𝑒 𝑊𝑖𝑑𝑡ℎ𝑠 𝑜𝑓 𝑅𝑖𝑣𝑒𝑟𝑠 𝑎𝑛𝑑 𝑆𝑡𝑟𝑒𝑎𝑚𝑠 𝐴𝑐𝑟𝑜𝑠𝑠 𝑆𝑝𝑎𝑡𝑖𝑎𝑙 𝑆𝑐𝑎𝑙𝑒𝑠... 🔗 doi.org/10.1029/2025...
#hydrology #geomorphology #rivers #RemoteSensing
𝑇ℎ𝑒 𝑊𝑖𝑑𝑡ℎ𝑠 𝑜𝑓 𝑅𝑖𝑣𝑒𝑟𝑠 𝑎𝑛𝑑 𝑆𝑡𝑟𝑒𝑎𝑚𝑠 𝐴𝑐𝑟𝑜𝑠𝑠 𝑆𝑝𝑎𝑡𝑖𝑎𝑙 𝑆𝑐𝑎𝑙𝑒𝑠... 🔗 doi.org/10.1029/2025...
#hydrology #geomorphology #rivers #RemoteSensing
June 19, 2025 at 2:10 PM
🚨New paper🚨 shows a remarkably clean relationship between river width and stream order across the US
𝑇ℎ𝑒 𝑊𝑖𝑑𝑡ℎ𝑠 𝑜𝑓 𝑅𝑖𝑣𝑒𝑟𝑠 𝑎𝑛𝑑 𝑆𝑡𝑟𝑒𝑎𝑚𝑠 𝐴𝑐𝑟𝑜𝑠𝑠 𝑆𝑝𝑎𝑡𝑖𝑎𝑙 𝑆𝑐𝑎𝑙𝑒𝑠... 🔗 doi.org/10.1029/2025...
#hydrology #geomorphology #rivers #RemoteSensing
𝑇ℎ𝑒 𝑊𝑖𝑑𝑡ℎ𝑠 𝑜𝑓 𝑅𝑖𝑣𝑒𝑟𝑠 𝑎𝑛𝑑 𝑆𝑡𝑟𝑒𝑎𝑚𝑠 𝐴𝑐𝑟𝑜𝑠𝑠 𝑆𝑝𝑎𝑡𝑖𝑎𝑙 𝑆𝑐𝑎𝑙𝑒𝑠... 🔗 doi.org/10.1029/2025...
#hydrology #geomorphology #rivers #RemoteSensing
Hana (grad student in my group) will be doing a research internship at JPL this summer. Here she is on her first day on the job. Good luck, Hana!! 🚀🚀🚀
May 27, 2025 at 4:43 PM
Hana (grad student in my group) will be doing a research internship at JPL this summer. Here she is on her first day on the job. Good luck, Hana!! 🚀🚀🚀
NASA news article on our recent study on the #SWOT satellite's ability to capture hydrologic flow waves in rivers
Link to paper: doi.org/10.1029/2024GL113875
Link to paper: doi.org/10.1029/2024GL113875
NASA-French Satellite Spots Large-Scale River Waves for First Time - NASA
In a first, researchers from NASA and Virginia Tech used satellite data to measure the height and speed of potentially hazardous flood waves traveling down
nasa.gov
May 21, 2025 at 5:25 PM
NASA news article on our recent study on the #SWOT satellite's ability to capture hydrologic flow waves in rivers
Link to paper: doi.org/10.1029/2024GL113875
Link to paper: doi.org/10.1029/2024GL113875
Reposted by George H. Allen
🌐 Introducing GRIT: the First Global Bifurcating River Network 🏞
developed by Michel Wortmann as part of the NERC Large Grant EvoFLOOD, in the Hydro-Climate Extremes group @oxfordgeography.bsky.social
developed by Michel Wortmann as part of the NERC Large Grant EvoFLOOD, in the Hydro-Climate Extremes group @oxfordgeography.bsky.social
May 16, 2025 at 2:28 PM
🌐 Introducing GRIT: the First Global Bifurcating River Network 🏞
developed by Michel Wortmann as part of the NERC Large Grant EvoFLOOD, in the Hydro-Climate Extremes group @oxfordgeography.bsky.social
developed by Michel Wortmann as part of the NERC Large Grant EvoFLOOD, in the Hydro-Climate Extremes group @oxfordgeography.bsky.social
Hydrologists! Ever heard of a Spatial Hydrograph? Our new paper in @agu.org GRL shows that the SWOT satellite can capture spatial flow waves propagating down rivers—something previously only only observable at river gauges: doi.org/10.1029/2024...
#SWOT #hydrology #RemoteSensing #EarthObservation
#SWOT #hydrology #RemoteSensing #EarthObservation
May 19, 2025 at 6:15 PM
Hydrologists! Ever heard of a Spatial Hydrograph? Our new paper in @agu.org GRL shows that the SWOT satellite can capture spatial flow waves propagating down rivers—something previously only only observable at river gauges: doi.org/10.1029/2024...
#SWOT #hydrology #RemoteSensing #EarthObservation
#SWOT #hydrology #RemoteSensing #EarthObservation
Reposted by George H. Allen
Delighted to see our @NERCscience @EvoFlood project research on changing flood hazard and risk profiled by @theAGU 💜 @lborouniversity
eos.org/research-spo...
eos.org/research-spo...
May 16, 2025 at 12:00 AM
Delighted to see our @NERCscience @EvoFlood project research on changing flood hazard and risk profiled by @theAGU 💜 @lborouniversity
eos.org/research-spo...
eos.org/research-spo...
Reposted by George H. Allen
The American public is broadly supportive of maintaining federal science and medical research funding, and against punishing universities by taking their funding away, according to a new poll:
Few support punitive funding cuts to colleges and universities - AP-NORC
Most of the public believes that colleges and universities make significant contributions to scientific and technological advancement and think their federal research funding should be maintained.
apnorc.org
May 14, 2025 at 8:14 PM
The American public is broadly supportive of maintaining federal science and medical research funding, and against punishing universities by taking their funding away, according to a new poll:
Reposted by George H. Allen
Are water levels in wetlands important to you? @kica22.bsky.social's new paper in GRL shows that the SWOT satellite can measure water surface elevations in the Everglades with a mean absolute error of 6.7 cm. Check it out! agupubs.onlinelibrary.wiley.com/doi/10.1029/...
May 12, 2025 at 3:11 PM
Are water levels in wetlands important to you? @kica22.bsky.social's new paper in GRL shows that the SWOT satellite can measure water surface elevations in the Everglades with a mean absolute error of 6.7 cm. Check it out! agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Congrats to Luisana Rodriguez Sequeira, who successfully defended her Master's Thesis on satellite #remotesensing of #microplastics in rivers! I had the pleasure of co-advising with Dr. Austin Gray @austindoug13.bsky.social. She presented to a standing-room-only crowd—well done, Luisana!
May 1, 2025 at 3:31 PM
Congrats to Luisana Rodriguez Sequeira, who successfully defended her Master's Thesis on satellite #remotesensing of #microplastics in rivers! I had the pleasure of co-advising with Dr. Austin Gray @austindoug13.bsky.social. She presented to a standing-room-only crowd—well done, Luisana!
Reposted by George H. Allen
Do you work on lakes globally? Check out what is, to my mind, the most complete global database of lakes (~6M) and associated attributes, newly published in WRR. Also the basis for SWOT lake data. agupubs.onlinelibrary.wiley.com/doi/full/10....
March 19, 2025 at 12:28 PM
Do you work on lakes globally? Check out what is, to my mind, the most complete global database of lakes (~6M) and associated attributes, newly published in WRR. Also the basis for SWOT lake data. agupubs.onlinelibrary.wiley.com/doi/full/10....
What a fun paper describing rivers in North and South America that flow into multiple drainage basins. agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Unusual Drainages of the Americas
We describe nine river bifurcations and bifurcation lakes in North and South America. They at first seem to defy the rules of hydrology These unusual water bodies exhibit bidirectional flow, unre...
agupubs.onlinelibrary.wiley.com
April 8, 2025 at 1:30 PM
What a fun paper describing rivers in North and South America that flow into multiple drainage basins. agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Reposted by George H. Allen
Excited for the annual Virginia Tech Geoscience Student Research Symposium (GSRS) — a 2-day event w/ talks, poster sessions, the always-entertaining 'UpGoer Five' session, and more!
It kicks off this morning and I'm looking forward to learning about all the amazing science our students are doing.
It kicks off this morning and I'm looking forward to learning about all the amazing science our students are doing.
April 3, 2025 at 12:06 PM
Excited for the annual Virginia Tech Geoscience Student Research Symposium (GSRS) — a 2-day event w/ talks, poster sessions, the always-entertaining 'UpGoer Five' session, and more!
It kicks off this morning and I'm looking forward to learning about all the amazing science our students are doing.
It kicks off this morning and I'm looking forward to learning about all the amazing science our students are doing.
Our new paper maps wind fields over lakes using radar backscatter from SWOT and Sentinel-1 satellites. This technique achieves a much higher spatial resolution than what is available from atmosphere reanalysis products:
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
March 31, 2025 at 9:30 PM
Our new paper maps wind fields over lakes using radar backscatter from SWOT and Sentinel-1 satellites. This technique achieves a much higher spatial resolution than what is available from atmosphere reanalysis products:
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
A graduate student takes a stream width measurement on Stroubles Creek, Virginia Tech.
March 7, 2025 at 2:50 PM
A graduate student takes a stream width measurement on Stroubles Creek, Virginia Tech.